ASME B16.47 Class 150 Series A Blind Flanges
| Nominal Pipe Size | Outside Diameter (O) | Minimum Thickness (T) | Raised Face Diameter (R) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|
| 26 | 34.25 mm | 2.69 mm | 29.50 mm | 702 lb | 31.75 mm | 24 | 1.38 mm |
| 28 | 36.50 mm | 2.81 mm | 31.50 mm | 833 lb | 34.00 mm | 28 | 1.38 mm |
| 30 | 38.75 mm | 2.94 mm | 33.75 mm | 982 lb | 36.00 mm | 28 | 1.38 mm |
| 32 | 41.75 mm | 3.19 mm | 36.00 mm | 1238 lb | 38.50 mm | 28 | 1.62 mm |
| 34 | 43.75 mm | 3.25 mm | 38.00 mm | 1384 lb | 40.50 mm | 32 | 1.62 mm |
| 36 | 46.00 mm | 3.56 mm | 40.25 mm | 1676 lb | 42.75 mm | 32 | 1.62 mm |
| 38 | 48.75 mm | 3.44 mm | 42.25 mm | 1819 lb | 45.25 mm | 32 | 1.62 mm |
| 40 | 50.75 mm | 3.56 mm | 44.25 mm | 2040 lb | 47.25 mm | 36 | 1.62 mm |
| 42 | 53.00 mm | 3.81 mm | 47.00 mm | 2380 lb | 49.50 mm | 36 | 1.62 mm |
| 44 | 55.25 mm | 4.00 mm | 49.00 mm | 2715 lb | 51.75 mm | 40 | 1.62 mm |
| 46 | 57.25 mm | 4.06 mm | 51.00 mm | 2961 lb | 53.75 mm | 40 | 1.62 mm |
| 48 | 59.50 mm | 4.25 mm | 53.50 mm | 3350 lb | 56.00 mm | 44 | 1.62 mm |
| 50 | 61.75 mm | 4.38 mm | 55.50 mm | 3716 lb | 58.25 mm | 44 | 1.88 mm |
| 52 | 64.00 mm | 4.56 mm | 57.50 mm | 4156 lb | 60.50 mm | 44 | 1.88 mm |
| 54 | 66.25 mm | 4.75 mm | 59.50 mm | 4639 lb | 62.75 mm | 44 | 1.88 mm |
| 56 | 68.75 mm | 4.88 mm | 62.00 mm | 5130 lb | 65.00 mm | 48 | 1.88 mm |
| 58 | 71.00 mm | 5.06 mm | 64.00 mm | 5675 lb | 67.25 mm | 48 | 1.88 mm |
| 60 | 73.00 mm | 5.19 mm | 66.00 mm | 6155 lb | 69.25 mm | 52 | 1.88 mm |